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These systems are very sensitive to the amount of refrigerant. That's why it's important to use a vacuum pump, the scales and. Professional gauges when recharging. The gauge on Those cans is a joke....

First thing to do is read the transmission code(s). Obd scanners can't do that. I use INPA for that. They will do it for you in the transmission shop and they will drive your car and make an educated...